Revolving harrow.



y W. GRAPE.

REVOLVING HABROW.

APPLICATION FILED 00T. 24, 1908.

Patented Apr. 27, 1909.

2 SHEETS-SHEET 2.

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WILLIAM GRAFE, OF VIOLA, IDAHO.

REVOLVING HARROW.

Specification of Letters Patent.

Application filed October 24, 1908.

Patented April 27', 1909.

Serial No. 459,405.

To all whom t may concern:

lfie it known that l, lViLLLiM Gnarls, residing at Viola, in the countyof Latah and State of Idaho, have invented a new and Improved RevolvingVHarrow, of which the following is a specification.

My invention has for its object to provide a simple and inexpensiverevolving harrow, more especially adapted for being used as a ridingharrow or weeder, and for being readily attached to seeders andplanters, and it comprehends an' improved arrangement of drag framehaving means for detachably connecting with a seeder or planter frame orthe common type of sulky cart and a harrow comprising a revolving headmounted on the drag fra-me, and certain details of construetion of theharrow head, all of which will be hereinafter fully described,specifically pointed out in the appended claims and illustrated in theaccompanying drawings, in which:

Figure l, is a perspective view that illustrates my improved harrow ascombined with an ordinary type of sulky or cart, the harrow being at itslowermost or operative position. F i0'. 2, is a similar view showing theharrow elevated for being carted over the field. Fig. 3, is a vertical,longitudinal section thereof. Fig. if, is a perspective view of theharrow head and the drag frame in which the head is mounted, and Fig. 5,is a detail view that illustrates the revolving head and the teethcarrying plates separated. Figs. 6, T and 8 are enlarged detail views ofportions of my device which will hereinafter be referred to.

In the practical arrangement, my invention consists of a simple form ofdrag frame comprising side bars i2-( and a cross or brace bar b thatjoins at the ends with the side bars nearly midway thereof and to whichit is secured in any approved manner, preferably by angle plates C-cthat join with the cross and side bars as clearly shown in the drawings.

The ends of the side bars (z2-c2 have transverse apertures c that formthe bearings for the short end journals (/-d on the barrow head (Z andwhen desired the said bearings may have supplemental wear sleeves c-cthat are fitted in the apertures c-a, their ends being bent up to formcollars for holding them firmly `within the apertures.

At the forward end each side bar at has ferrule like member formed of asingle piece of strap metal bent over the said bar ends and securedthereto by a bolt and nut.

The ends of the strap metal are bent up vertically from the bars at toform ears jf/ f and these are apertured to receive the hanger bails g gthat hingedly support the drag frame from the forwardly extended sidebeams /t of the sulky frame ll when my iniln-ovement is used in themanner best shown in Figs. l, 2 and it being understood that when myinvention is to be used on a secder or planter frame the said hangerears f"-f" can be attached to the planter frame in any approved manner.

The sulky frame shown in Figs. l., l and 3 includes a lever t that isfulcrnmed at the lower end to a stud piece on the tongue j and it has aright angle portion t for receiving the hooked end 1 of a lifting rod/Lf that is hingedly joined to the cross bar L.

By reason of providing the lever the o perator who rides the sulky canconveniently raise the revolving;- iarrow h `ad oilI the ground whenturning around or cai-ting the same across the field.

The revolving harrow head, the construction of which forms the essentialfeature of my invention, and which is best shown in Figs. l and C5consists of a solid hub or shaft r/ the ends of which are reduced toform the Ijournals and midway the ends of the said had is of a reduceddiameter as at (Z2, whereby to form end bearings f/ of a larger diameterthan the body portion, prolicr, of the head for the reason presentlyunderstood.

lt) designates a series of spring metal plates of a length equal that ofthe head proper, andv these plates in practice are slightly bowed inthedirection of their length, whereby to add increased resiliency theretowhen secured to the head (Z as shown.

VEach of the plates Y10 has a series of spring metal harrow teeth l2,ach having` a reduced threaded heel l2 for 'passing through theapertures Il in the plates l() and to receive thc clamp nuts Vlil asclearly shown in Figs. (S and T.

"lo render the attachment of the plates l() to the head (I the morerigid and durable the end bearings fl of the head have longitudinallyextended peripheral sockets d* to receive the ends of the plates l()which are secured by the bolt screw and nut menibers 14.

T he plates l0 are disposed obliquely with the said side bars,

respect to the longitudinal axis of the head to cause each roW of teethin coming in contact With the ground to engage consecutively instead ofall at one time, thereby rendering the revolving of the head the morepositive and at the saine time reduce danger of breaking the teeth inengaging solid stubble7 rocks, etc.

By bowing the plates l0 and reducing the diameter of the head l betweenthe ends that receive the ends of the said plates ample provision ismade for permitting' a free springy action of the plates l0 with theirteeth to reduce shock of teeth engaging solids, and at the same timegive the teeth and the plates ample room to spring backward or inwardlyin passing over obstructions.

l am avrai-e that rotary harrour heads have been heretofore provided andadapted for being` attached to a drag or a Tvheeled trame. My invention,so tar as l know, differentiates from What has been provided in themanner in Which the head is constructed since provision is made forgiving the teeth the desired resiliency to escape easy breaking whenpassing over obstructions and yet at the saine time give the teeth thedesired rigidity for the Work intended.

Having thus described my invention, what l claim is:

l. The combination ot' a Wheel supported main traine, a supplementaltraine that includes side bars having means at the front ends forhingedly and pendently connecting With the main frame, means on the mainframe connected with the supplemental trame for lifting the supplementaltrame, a` rotary head mounted in the rear ends of the said head havingend bearings of a greater diameter than the body portion proper, formedWith longitudinal sockets and spring metal tooth carryingplates mountedlengthwise on the head With their ends in the sockets of the endbearings thereof, means for fixedly securing the said ends on the head,the said plates being bowed outwardly substantially as shown and for thepurposes described.

2. A harrow attachment of the character described comprising a frameincluding side bars, a rotary head mounted in the rear ends of the sidebars, said head comprising a central portion of one diameter and endportions of a larger diameter, the said end portions `havinglongitudinal sockets and 'bowed spring metal plates that extendlengthwise of the head whose ends tit the sockets in the bearingportions and are secured thereto, said plates carrying tooth members.

8. A harroiv attachment of the character described comprising a frameincluding side bars, a rotary head mounted in the rear ends of the sidebars, said head comprising a central portion ot' one diameter and endportions of a larger diameter, the said end portions having'longitudinal sockets and bowed spring metal plates that extend hlengthwise of the head in oblique direction,

Whose ends tit the sockets in the bearing portions and are securedthereto, and tooth members detachably secured to the said plates,substantially as shown and for the purposes described.

VILLIAM GRAPE. Vitnesses H. IVIELGARD,

A. P. DAHL.

